H. Koch and N. Tzvetkov, On the local well-posedness of the Benjamin-Ono equation in $H^s(\mathbb R)$, IMRNInternational Mathematics Research Notices, 26 (2003), 1449–1464.
doi: 10.1155/S1073792803211260.

H. Koch and N. Tzvetkov, On the local well-posedness of the Benjamin-Ono equation in $H^s(\mathbb R)$, IMRNInternational Mathematics Research Notices, 26 (2003), 1449–1464.
doi: 10.1155/S1073792803211260.